I was watching this YT film about plotting on Excel. I copied the numbers from the film into an Excel sheet and plotted x against y1 and got a blue coloured plot. Then I plotted x against y2 and plotted a chart again. Though a second red coloured plot did not appear as in the film. Instead my original plot vanished and the second plot appeared, but again in blue. How do I have both the x against y1 in blue, and the x against y2 in red on the same scatter plot? Thank you.